2.5.2 AGC voltage relating to Gain - The 2097 operates over a 0 to -80 dBm input. In Automatic Gain Control (AGC)
(with S1 to AGC), the gain is adjusted automatically to provide a constant -35 ± 10 dBm output level over the entire 0 to -80 dBm
input. In Manual Gain Control (MGC) (with S1 to MGC) the gain is adjusted by potentiometer R40 on the front panel. Test
points TP3 and TP4 can be monitored to determine the approximate gain and the approximate input level in AGC as the following
table shows. This voltage is not available in MGC.
A
B
C
D
TABLE 2.1 2097 AGC Voltage and Gain and Input Level Information
TABLE 2.1 2097 AGC Voltage and Gain and Input Level Information
TABLE 2.1 2097 AGC Voltage and Gain and Input Level Information
AGC Monitor DC Volts
AGC Gain
AGC'd Input Level (dBm)
<-3
>40
-80
-2.17
35
-70
-1.9
25
-60
-1.65
15
-50
-1.37
5
-40
-1.01
-5
-30
-0.55
-15
-20
0.02
-25
-10
0.59
-35
0
2097 manual Rev 0
Page 6
3/13/03
